Having had another look the 3rd 3394 is also missing.
--- In Simmons_Drums@yahoogroups.com, Steve Ridley <spr@s...> wrote:
>
> > The chips that are missing are marked iC37 & IC38. Can anyone
verify
> > that these are curtis chips & what the curtis part number is ?
>
> They're Curtis CEM3394s. There should be one for each tom. Does
one of the
> toms work? There is also a CEM3372, but that's a filter for the
snare.
> CEM3394s are not easy to find. Paul "MOTM" Schreiber keeps most
Curtis chips,
> but he's out of 3394s. You should be able to get the data sheet
off his site
> though.
>
> Do you know why the 3394s were removed? Before you replace them,
check the
> power supply. Curtis chips are very vulnerable to excess voltage.
The
> PSU should give +15v, +5v and -6.5v. I had a PSU go bad in an
SDS1000
> (cut down SDS9 in a rack), and it took out the Curtis chips and a
random
> selection of other devices. Sound familiar?
>
> I have schematics, but my scanner is dying. If you're not too far
away, I
> might consider photocopying and posting them for you...
>
>
> Steve